$dates_ts[] = strtotime($charge->getDate());
}
$dt = $gs->getSeriesDataByColumn('date');
$t->cmp_ok($dt[0], '===', $dates, 'By default, ->getSeriesDataByColumn() returns unmodified data');
$dt = $gs->getSeriesDataByColumn('date', 'datetime');
$t->cmp_ok($dt[0], '===', $dates_ts, 'By setting "datetime" option, ->getSeriesDataByColumn() returns data formatted as timestamps');
$series = array(new ChartDataSerie(array('raw_data' => $data)), new ChartDataSerie(array('raw_data' => $data)), new ChartDataSerie(array('raw_data' => $data)));
$gs->setSeries($series);
$series = $gs->getSeriesDataByColumn('kilometers');
$t->cmp_ok(count(array_keys($series)), '===', 3, '->getSeriesDataByColumn() returns a data serie for each raw data serie stored.');
$t->cmp_ok(array(count($series[0]), count($series[1]), count($series[2])), '===', array(count($data), count($data), count($data)), '->getSeriesDataByColumn() returns a value for each element in raw_data');
// ->filterValuesLargerThan()
$t->diag('->filterValuesLargerThan()');
$data = array(1, 2, 3, 4, 5, 6, 7, 8);
$cs = new ChartSource();
$keys = $cs->filterValuesLargerThan($data, 5);
$t->cmp_ok($keys, '===', array(1, 2, 3, 4, 5), '->filterValuesLargerThan() returns the elements of the input array whose value is lower than the given bound');
// ->filterValuesSmallerThan()
$t->diag('->filterValuesSmallerThan()');
$data = array(1, 2, 3, 4, 5, 6, 7, 8);
$cs = new ChartSource();
$keys = $cs->filterValuesSmallerThan($data, 5);
$t->cmp_ok($keys, '===', array(4 => 5, 5 => 6, 6 => 7, 7 => 8), '::filterValuesSmallerThan() returns the elements of the input array whose value is larger than the given bound');
// ->filterValuesDifferentThan()
$t->diag('->filterValuesDifferentThan()');
$data = array(1, 1.1, 0.9, 2, 3, 1, 1);
$cs = new ChartSource();
$keys = $cs->filterValuesDifferentThan($data, 1);
$t->cmp_ok($keys, '===', array(0 => 1, 5 => 1, 6 => 1), '::filterValuesDifferentThan() returns the elements of the input array whose value is equal than the given bound');
// ->filterValuesOutsideRange
$t->diag('->filterValuesOutsideRange()');
